Novel ternary Y-B-C compound: Y10+xB7C10-x (x 0.1)

Takaho Tanaka, Akira Sato, Katsuaki Watanabe, Masahiro Nagao, Yoshio Matsui, Tetsuya Kawashima, Takashi Aizawa

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A novel ternary Y-B-C compound Y10+xB7C 10-x is established. Y10+xB7C10-x has a monoclinic crystal structure with space group C2/c (No.15) and lattice constants a 1.1273(14) nm, b 1.1159(14) nm, c 2.3566(30) nm and β 98.15(2)°. Y10+xB7C10-x crystal rods were grown by floating zone technique and consisted of a predominant crystal phase and impurity phases. A small crystal having sufficient quality for single crystal XRD analysis could be selected. Structure refinement achieved a final R1 0.044 for 1660 independent reflections with Fo > 4s(F o). 10 Y sites, 8 B sites, 9 C sites and one C/Y mixed occupancy site with about 0.9/0.1 occupation ratio were assigned. The unit chemical formula is Y10+xB7C10-x (x0.1), and the unit cell contains 8 formula units. Y10+xB7C10-x has a layer structure: Y-C double layers, in which Y and C bond alternatively like in the NaCl structure, spread parallel to the (001) plane and stack along the c-axis. The Y-C double layer is connected to the neighboring Y-C double layers via C-B-C chains or C-B-B-C chains. This structure was confirmed by electron diffraction and high-resolution electron microscopy. Magnetic susceptibility measurement indicated that the Y10+xB7C10-x phase has no superconductivity above 2 K. A minor superconducting phase with Tc=7.5 K was observed, but ascribed to an unidentified impurity phase.

Original languageEnglish
Article number012006
JournalJournal of Physics: Conference Series
Volume176
DOIs
Publication statusPublished - 2009
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Novel ternary Y-B-C compound: Y<sub>10+x</sub>B<sub>7</sub>C<sub>10-x</sub> (x 0.1)'. Together they form a unique fingerprint.

  • Cite this

    Tanaka, T., Sato, A., Watanabe, K., Nagao, M., Matsui, Y., Kawashima, T., & Aizawa, T. (2009). Novel ternary Y-B-C compound: Y10+xB7C10-x (x 0.1). Journal of Physics: Conference Series, 176, [012006]. https://doi.org/10.1088/1742-6596/176/1/012006